These are Kyosho factory replacement HD differential output shafts for the FZ02 chassis, used in the Fazer Electric platform. Sold as a set of two, they feature a cup-style outdrive end with retention slots and a splined pin shaft for connecting to the drivetrain. The HD designation indicates a heavy-duty design intended to improve durability over the standard parts. Features: Heavy-duty construction for improved durability Cup-style outdrive end with retention slots Sold as a set of two Direct replacement for FZ02 chassis 7/7/26 cs